(archaeology) A construction involving one or several roughly hewn stone slabs of great size. / A large stone used in such a construction.

A measure of the strength of an explosion or a bomb based on how many million tons of TNT would be needed to produce the same energy.

A portable, usually hand-held, funnel-shaped device that is used to amplify a person’s natural voice toward a targeted direction.

(transitive, intransitive) To use a megaphone; to speak through a megaphone.

(organic chemistry) A cytotoxic neolignan obtained from the laurel Aniba megaphylla.

A large conurbation, where two or more large cities have sprawled outward to meet, forming something larger than a metropolis; a megacity.

One million amperes

plural of megaampere

megahertz

Of or pertaining to megaliths, to the people who made them, or to the period when they were made.